Townley served with the 2nd, 5th and 13th Australian Light Horse Regiments during World War I. Born in Queensland, he enlisted in Gayndah on 24 October 1914. He was a 19-year-old surveyor's cadet, just 5' 5" tall, who had previously served in his school cadets and the Citizen Forces. He was placed in the 5th Light Horse Regiment, 2nd Light Horse Brigade - service # 299. He embarked for overseas in Sydney on the Persic on 21 December 1914. He served in Egypt (but apparently not Gallipoli) and France, and was quickly promoted:
Corporal - 26/1/1916
Acting Regimental Quartermaster Sergeant (RQMS) - 21/4/1916
Second Lieutenant - 2/6/1916
Referred to as Corporal - February and August 1916
Adjutant 1st Anzac Army Corps - 30/12/1916 (relinquished 29/4/1917)
Lieutenant - 29/3/1917
Adjutant 1st Anzac Army Corps - 1/11/1917
He was moved from the 5th Light Horse Regiment to the 2nd Reserve Light Horse Regiment, and later to the 13th. He managed to escape notifiable injury.
sailed back to Austalia in May 1919.
National Archives of Australia Series B2455, TOWNLEY DUDLEY ARNOLD LANGFORD